package com.csxy.news.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;

import com.csxy.news.util.WebUtil;

/**
 * Servlet Filter implementation class EncodeingFilter
 */
public class EncodeingFilter implements Filter {

    private String encoding;

	/**
     * Default constructor. 
     */
    public EncodeingFilter() {
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		// place your code here
		
		//设置请求的字符解码
		request.setCharacterEncoding(this.encoding);
		
		//设置响应的字符编码
        response.setCharacterEncoding(this.encoding); 
        response.setContentType("text/html; charset="+this.encoding);
		// pass the request along the filter chain
		chain.doFilter(request, response);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		this.encoding=fConfig.getInitParameter(WebUtil.CHARACTER_ENCODING);
	}

}
